PDFKit.NET is a 100% managed (verifiable) .NET class library for creating and manipulating PDF documents. It consists of just a single assembly that can be xcopy-deployed. It has no dependencies other than the .NET framework. Central to PDFKit.NET is a consistent and highly intuitive object model consisting of classes like Document, PageCollection, Page, Canvas, Shape, Bookmark, Annotation, Field, etc. The focus of the development team is always to ease the task of integrating our class libray in a larger application. These are PDFKit.NET’s primary features:

Fill and flatten PDF forms
Split and assemble PDF documents
Apply security settings such as passwords
Stamp content on new and existing pages
Support for CMYK and Grayscale colorspace
Read, Create and Modify Actions, Sticky Notes and Links
Active jаvascript interpretation (for formatted and calculated fields)
Adobe LiveCycle Designer compatibility (static forms only)
Extract and search text
Digitally signing and verification
Native .NET 2.0 support, including 64-bit support

LibXL is a library that can read and write Excel files. It doesn't require Microsoft Excel and .NET framework, combines an easy to use and powerful features. Library can be used to

Generate a new spreadsheet from scratch
Extract data from an existing spreadsheet
Edit an existing spreadsheet

PDF Mosaic allows you to create, merge and modify PDF documents. Simple yet powerful API will help you to process PDF documents with ease. PDF Mosaic does not require any third-party applications or libraries to generate or modify PDF documents. PDF Mosaic is a C# library, it is created for .NET Framework 2.0 and later.

HTML Editor Library - WYSIWYG HTML Editor for Delphi. Yes, it is real (and currently the only one) WYSIWYG and 100% native HTML editor written in Delphi.

Basic features
WYSIWYG editing.
Does not use IE or other libraries (100% native Delphi code).
Supports all Delphi versions from Delphi 5 to Delphi 10.2 Tokyo.
VCL (Win32/64) FMX (Windows / OSX / Android / iOS / Linux)
Full support for touch-screen devices - gestures, text selection (Windows Tablets/Screens, iOS, Android, OSX)
Smooth scrolling on Android and iOS.
Unicode support for Delphi 6 - 2007 (requires TNTUnicode).

PDFRasterizer.NET is a 100% .NET (verifiable) solution for printing PDF documents unattended and converting PDF documents to a raster image, WPF graphics or an XPS document.